AntagonistOne who contends with another, especially in combat; an adversary; an opponent."Antagonist of Heaven's Almigthy King.""Our antagonists in these controversies."

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Century Dictionary and Cyclopedia

nantagonistOne who contends with another in combat or in argument; an opponent; a competitor; an adversary.

nantagonistIn anatomy, a muscle which acts in opposition to another: as, a flexor, which bends a part, is the antagonist of an extensor, which extends it. Synonyms Adversary, Antagonist, Opponent, etc. (see adversary), opposer, rival, assailant.

antagonistCounteracting; opposing; combating: as, antagonist forces; an antagonist muscle. The flexors and extensors of a limit, as also the abductors and adductors, have to each other the relation of antagonist muscles.

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Chambers's Twentieth Century Dictionary

nAntagonistone who contends or struggles with another: an opponent

adjsAntagonistcontending against: opposed to

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Quotations

Johann Wolfgang Von Goethe

“No wise combatant underestimates their antagonist.”

Richard Brinsley Sheridan

“Remember that when you meet your antagonist, to do everything in a mild agreeable manner. Let your courage be keen, but, at the same time, as polished as your sword.”

Johann Wolfgang Von Goethe

“No prudent antagonist thinks light of his adversaries.”

Plato

“There must always remain something that is antagonistic to good.”

Emile Coue

“When the imagination and will power are in conflict, are antagonistic, it is always the imagination which wins, without any exception.”

William Mathews

“All maxims have their antagonist maxims; proverbs should be sold in pairs, a single one being but a half truth.”

An incendiary new Spanish-language ad from GOP nominee Mitt Romney links President Obama to Venezuelan President Hugo Chavez and former Cuban President Fidel Castro , two frequent American antagonists from Latin America.

Braincells, Inc Announces the Successful Completion of a Multiple Ascending Dose Study of BCI-838, a Group II mGluR2/3 Antagonist, and the Company's Plans for a Proof-of-Concept Study in Patients with Treatment-Resistant Depression.

Braincells, Inc Announces the Successful Completion of a Multiple Ascending Dose Study of BCI-838, a Group II mGluR2/3 Antagonist, and the Company's Plans for a Proof-of- Concept Study in Patients with Treatment-Resistant Depression.

Tensions have reached a boiling point at Corona 's hospital after physicians held an emergency meeting to ask the top administrator to resign because of what they call antagonistic management practices.

In science:

This strategy simulates the fact that a recessive mutation, to be effective, must be inherited from both parents; alternatively, it can be interpreted as antagonistic pleiotropy, the trade-off between fecundity and longevity [8, 3].

Applications and Sexual Version of a Simple Model for Biological Ageing

Let us assume that an integer electric charge e rotating along an orbit of radius r generates two antagonist forces, one centripetal (action) and the other one centrifugal (reaction), that fix its equilibrium state, and let's start with the non relativist formulation.

Nature and Quantization of the Proton Mass: An Electromagnetic Model

The proton, which appears as the only particle with r < 2.8 Fm, is stable despite being at the top of the left part of the curve where the offset between the two antagonist structural energies, compressive and expansive, is maximum.

Nature and Quantization of the Proton Mass: An Electromagnetic Model

These two antagonist effects should in principle induce some massdependent variations in the galaxy-temperature crosscorrelation function.

Constraining neutrino masses with the ISW-galaxy correlation function

Biological control agents often exhibit marked variability in performance (Gibson et al., 1999), failing to provide isotropic control of infection on targeted hosts, for example due to uneven colonization of roots by microbial antagonists deployed as biological control agents.

Complexity and anisotropy in host morphology make populations safer against epidemic outbreaks

It is found that the natural antagonists, the pump strength P and the loss at the surfaces play a severe though in ﬁrst instance counterintuitive role.

The application of a perceptron model to classify an individual's response to a proposed loading dose regimen of Warfarin

Not only does the size of the molecule set the scale of the self-assembled structures, such as the bilayer thickness, but also its “architecture”, the relative volumes of the two antagonistic molecular parts, can be directly correlated with the various morphologies.

Biological and synthetic membranes: What can be learned from a coarse-grained description?

Disruption of p21 activity leads to enhanced p14Arf expression. The p14 proteins are antagonistic to the MDM2 activity so that p53 proteins can accumulate to higher levels.

The p53-MDM2 network: from oscillations to apoptosis

The constraint adds a tangential stress proportional to the multiplier T ab ; tension will be introduced in the surface whenever its action is antagonistic to bending.

How paper folds: bending with local constraints

However, its antagonists believe that knowing the author’s identity makes it easier to compare the new manuscript with previously published papers, and it also encourages the reviewers to disclose conﬂicts of interest [ 1].